📌  相关文章
📜  sql 计算重复行数 - SQL 代码示例

📅  最后修改于: 2022-03-11 15:05:05.309000             🧑  作者: Mango

代码示例6
• SELECT first_name, COUNT (first_name) FROM employees
GROUP BY first_name
HAVING (COUNT(first_name) > 1);